this fistfight broke out at an h & m in culver city, california. the national retail federation expects up to 147 million people to be shopping this entire holiday weekend. so, with the extra crowds out there, retailers all around the country are hoping for this. nice, calm, orderly lines, like the one here at the apple store on the icon iic 5th avenue in n york city. but police are leaving nothing to chance. knowing the lure of a holiday deal. >> they just forget about regular every day courtesy and sometimes go nuts. >> reporter: the los angeles police department is putting hundreds of extra officers on foot, on horseback and in the air to monitor shopping crowds. big stores like best buy have been preparing for days now, creating color coded maps, moving merchandise around to ease congestion and holding dry runs. so employees can practice. >> get people in, safely and out safely, through the lanes quick, fast, in a hurry so they can get what they need. >> reporter: and the mall of america has taken the additional step of banning teenagers from s